<template>
  <view v-if="goods_info.goods_price" class="goods-detail-container">
   <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
     <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
      <image :src="item.pics_big" @click="preview(i)">  </image> 
     </swiper-item>
   </swiper>
   <view class="goods-info-box">
     <view class="price">￥{{goods_info.goods_price | price}}</view>
     <view class="goods-info-body">
       <view class="goods-name">{{goods_info.goods_name}}</view>
       <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
       </view>
     </view>
     <view class="yf">快递：免运费</view>
   </view>
   <rich-text :nodes="goods_info.goods_introduce"></rich-text>
   <view class="good-nav">
       <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
   </view>
 
  </view>
</template>

<script>
  import { mapState,mapMutations, mapGetters } from 'vuex'

  
  export default {
    data() {
      return {
        goods_info: {},
         options: [{
        			icon: 'shop',
        			text: '店铺',
        			info: 0,
        			infoBackgroundColor:'#007aff',
        			infoColor:"red"
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 2
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    }
        	    ]
      }
    },
    computed: {
        // 调用 mapState 方法，把 m_cart 模块中的 cart 数组映射到当前页面中，作为计算属性来使用
        // ...mapState('模块的名称', ['要映射的数据名称1', '要映射的数据名称2'])
        ...mapState('m_cart',['cart']),
        ...mapGetters('m_cart',['total'])
       
    },
    watch: {
      total: {
        handler(newValue) {
          const findResult = this.options.find(item => item.text === '购物车')
          if(findResult) {
            findResult.info = newValue
          }
        },
        immediate: true
      }
    },
    filters: {
      price(value){
        return Number(value).toFixed(2)
      }
    },
    methods: {
       // 把 m_cart 模块中的 addToCart 方法映射到当前页面使用
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id){
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', { goods_id })
        if(res.meta.status != 200) return uni.$showMsg()
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,'<img style="display: block; "').replace(/webp/g, 'jpg')
        this.goods_info = res.message
       
      },
      preview(i) {
         // 调用 uni.previewImage() 方法预览图片
         uni.previewImage({
            // 预览时，默认显示图片的索引
           current:i,
            // 所有图片 url 地址的数组
           urls:this.goods_info.pics.map(i => i.pics_big)
         })
      },
      onClick(e) {
        if(e.content.text === '购物车'){
          //切换到购物车页面
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        if(e.content.text === '加入购物车'){
             // 2. 组织一个商品的信息对象
             const goods ={
                goods_id: this.goods_info.goods_id,       // 商品的Id
                goods_name: this.goods_info.goods_name,   // 商品的名称
                goods_price: this.goods_info.goods_price, // 商品的价格
                goods_count: 1,                           // 商品的数量
                goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
                goods_state: true                         // 商品的勾选状态
             }
              // 3. 通过 this 调用映射过来的 addToCart 方法，把商品信息对象存储到购物车中
             this.addToCart(goods)
        }
      },
    
    },
    onLoad(options){
     const goods_id = options.goods_id
     this.getGoodsDetail(goods_id)
    },
   
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;
  
    image {
      width: 100%;
      height: 100%;
    }
  }
  // 商品信息区域的样式
  .goods-info-box {
    padding: 10px;
    padding-right: 0;

    .price {
      color: #c00000;
      font-size: 18px;
      margin: 10px 0;
    }

    .goods-info-body {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
        padding-right: 10px;
      }
      // 收藏区域
      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }

    // 运费
    .yf {
      margin: 10px 0;
      font-size: 12px;
      color: gray;
    }
  }
  .goods-detail-container {
    // 给页面外层的容器，添加 50px 的内padding，
    // 防止页面内容被底部的商品导航组件遮盖
    padding-bottom: 50px;
  }
  
  .good-nav {
    // 为商品导航组件添加固定定位
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }
</style>
